SUPPORT OF ROLLING CUTTER BIT Russian patent published in 1998 - IPC

FIELD: drilling machinery and equipment. SUBSTANCE: support of rolling cutter bit has radial roller bearings with cages which are made in the form of self-centering strips with cylindrical side surfaces which correspond to surfaces of bodies of revolution. Strips are located between bodies of revolution. They are made of elastic material and strengthened by reinforcing member having flanges directed in different sides relative to web of reinforcing member so that each flange strengthens cage body. Reinforcing member of cages of roller bearings is in the form of double-tee section with flanges over entire length of cage which is equal to length of roller. This embodiment enhances stability of drilling bit. EFFECT: higher efficiency. 3 dwg